> > > There are various methods for securing file_exists() ... > > If you want to secure ... so that's unsecure , is'nt it ? > > I didn't say that file_exists() is secure, did I?
> > >I don't think that is critical problem. > > If it's not a problem Why you show us a methode to secure ? > I didn't say that it is not a problem but that it is not a critical problem. > > I think many programmers don't know this problem exists ! > > But there is too much hypocresy in php community to admit this > > vulnerability. > This is not a PHP vulnerability but a PHP Script vulnerablity, and I am sure > that many php programmers are aware of security problems while using > file_exists(). > > The article : http://www.zend.com/zend/art/art-oertli.php > > don't talk about this sorry... > What is the problem, very interesting article, old one but still very > interesting. file_exists() must check if the file exists and with this vulnerabilty it don't do this. For me this function don't work good. re-read it :) 같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같 같� In the same directory : test.php ----------------------------------------------------------- <? if(file_exists($page)){ echo("Sorry the local page is protected"); }else{ include($page); } ?> ----------------------------------------------------------- file.txt ----------------------------------------------------------- Hello World ----------------------------------------------------------- http://www.example.com/test.php?page=file.txt Result: Sorry the local page is protected http://www.example.com/test.php?page=./[anything]/../file.txt <----------------- the file exists but the function file_exists() don't show it. so the file is include !!!!! Result: Hello World The function file_exists() is bypassing just with ./[anything]/../file.txt the function return wrong but the file exist 같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같같 같� Nourredine Himeur www.security-challenge.com _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
